Improvement in lathes for turning bobbins



W. 1%..I.ANII'JFEAR.V LATHES Fon TURNING BoBBINs.

In v enmf':

Patented Se Mlnes'ses.-

rotates when in place in the shuttle.

UNITED STATEs PATENT CEEICE WILLIAM R. LANDFEAR, OF\BROOKLYN, NE W YORK,ASSIGNOR TO TIMOTHY MERRIOK, OF HOLYOKE, MASSACHUSETTS.

I IMPROVEMENT IN LATHES FOR TURNING BOBBINS.

Speciication forming part of Letters Patent No. l95,29l, dated September18, 1877 application filed July 17, 1877.

To all whom it may concern:

Be it known that I, WILLIAM R. LANDFEAE, of Brooklyn, in the county ofKings and State of New York, have invented certain Improvements inMachines for Making Bobbins; and that the following is a full, clear,and exact description thereof, suiicient to enable those skilled in theart to which my invention appertains to make and use the same.

My invention is particularly adapted to machines for making bobbins forsewing-machine shuttles.

In the usual process employed in making bobbins for sewing-machineshuttles it is necessary to use two machines, one of which forms thebarrel of the bobbin and the other forms the gildgeons upon which thebobbin The work, consisting of a rod or bar of wood, either round orsquare, is carried by a sleeve and spindle, which rotate it and feed itto the cutters. One of the lcutters forms the barrel of the bobbin.Another cutter reduces the diameter of the wood between the bobbin thusformed and the portion from which the next bobbin is to be formed, andsaid reduced diameter is cut through transversely. The bobbin is thenremoved and placed in another machine, in which the gudgeons are formedby cutters moved up toward the ends of the bobbin from oppositedirections. This involves considerable trouble and loss of time, as itis necessary, after .the barrels have been formed f by one machine, toplace the bobbinsin another machine to be ni'shed by forming thegudgeons. Moreover, in the old process the gudgeons are sometimeseccentric, or one gudgeon is not in a right line with the other, so thatthe bobbins are caused to bind, or to fail to revolve accurately, whenin place in the shuttles.

To obviate these and other difculties experienced in the former processis the object of my invention; and to this end my invention consists ina novel construction, arrangement, and operation of devices for guidingand rotating the work, and of a device for forming the gudgeons on thebobbins, whereby the barrel is turned, the gudgeons formed, and thebobbin completely finished by one and the same machine, and whereby thegudgeons are formed uniformly on all the bobbins, so as to insure theiraccurate operation when in place in the shuttles.

In carrying out my invention the cutter which forms the barrel of thebobbin and the sleeve and spindle which carry the work and t'eed it tothe cutter may be of the usual or any other suitable description. So,also, may be the stationary and movable heads and their appurtenances.

The work, as it is rotated and fed to the cutters, passes through astationary guide, which, if desired, may be provided with a cutter forgiving a cylindrical form to the work before reaching the main cutters;or said guide may be simply a rest for the work, if the rod or bar ofwood has been previously made of cylindrical form and of the requireddiameter. The work then passes through another stationary guide, inwhich is a circular opening of a diameter corresponding with that oftheflanged portions or heads of the bobbin when finished. The work thencomes in contact with the cutter, which forms the barrel. Said cuttermay be similar in its construction and operation to those used in theordinary process, and is automatically thrown into and out of contactwith the work by cams or other suitable means.

As soon as the cutter has formed the barrel of the bobbin it isautomatically withdrawn therefrom. The outer or free end of the bobbinis then engaged by a chuck, which is carried by a spindle revolving withexactly the same velocity as the work. This spindle is provided withmeans for imparting to it a longitudinally-reciprocating motion withoutinterfering with its rotary motion, which means may consist of acam-movement so arranged, by belts or gearing, with relation to thedriving mechanism as to cause the spindle to advance toward and recedefrom the end of the bobbin at the exact time required, as hereinafterdescribed. When the chuck is engaged with the end ofthe bobbin thegudgeon-forming cutter is automatically thrown forward and intoengagement with the work between the inner end of the bobbin just formedand the portion of the wood from which the next bobbinisto be made. Thecutting-edge of this cutter is shaped like the letter V or two sides of'a triangle, and the result of its operation on the work is the forming,at one and the same time, of the inner gudgeon ofthe bobbin just madeand the first gud geon of the bobbin to be next made, which result isaccomplished by cutting a V-shaped groove and continuing the same untilthel wood is entirely cut through and said two gudgeons are separated,whereupon the cutter is automatically withdrawn and thrown back, thechuck recedes from the outer end of the bobbin, and the bobbin,completely finished, drops of its own weight, and the abovedescribedoperation is repeated. During the operation of forming the gudgeons theouter end of the bobbin is supported and rotated by the chuck and theinner end is supported by the station ary guide. As soon as the gudgeonsare formed and the chuck recedes the hobbin is allowed to drop from thestationary guide.

If desired, on the first commencement of the operation of the machinethe gudgeonforming cutter may be brought to bear upon the end of thework, so as to form the lirst gudgeon of the first bobbin.

The accompanying drawings illustrate a mode of carrying out myinvention.

Figure 1 is a front view of a machine embodying my improvements; andFig. 2 is a transverse vertical section of the same, taken in the linea: .fr of Fig. 1.

A is the bed, B the stationary head, and C the movable head, of amachine for making bobbins. D is a stationary head or standard, in theupper portion of which is a guide, E, which may be provided with acutter for giving a cylindrical form to the wood, or may be merely arest for the work. F is a spindle, carrying a sleeve holding the work,and rotated by a belt passing around a pulley, f. This spindle is alsoprovided with means for imparting to it a longitudinal motion, in orderto feed the work to the cutters.

All of the abovementioned parts maybe similar to those used in ordinarymachines for making bobbins.

G is a stationary guide, attached in any suitable manner to thestationary head or standard D. This guide consists of a plate having inits upper portion a circular opening corresponding with the diameter ofthe work and of the anged portion or head of the bobbin after the barrelhas been turned.

H is a spindle, having its bearings in the movable head C, and providedwith a pulley, h, for the reception of a belt, by which it may berotated at exactly the same speed as the spindle F. The spindle H has alongitudinally-reciprocating motion imparted to it by means of mechanismof any well-known or suitable description.

The head C need not necessarily be movable; but it may be desirable tohave it so arranged,in order to provide for the making of bobbins ofdifferent lengths, in4 nwhich` event it may be similar to the movablehead ofi an ordinary lathe. The head C may be permanently stationary,and the spindle H have a longitudinal motion therein or the head mayhave a reciprocating motion longitudinally of the spindle, and carry thesp'iii'dll with it.

As here represented, the distance between the bearings ot' the spindlein the head C is sufficient to allow the pulley h, to have ample playfor the necessary longitudinally-reciprocating motion of the spindle H,and this motion may be imparted by means of a cammovement or othersuitable 'mechanism'. (Not shown herein.)

The spindle H carries on its inner end a chuck, J, for engagement withthe outer end of the bobbin, as hereinafter described:

The gudgeon-forming cutter' K' has a V- shaped cuttin g-ed ge, and'iscarried by a stock, L, attached by a pivot, M, to the stationary head orstandard D, so as to allow' it to oscillatein a direction transversetothe length of i the bobbin and of the work. The cutter-stock has anoscillating motion imparted to it by means of a cam orothersuitable'device, (notv shown herein,) so as to causetle cutting-edge ofthe cutter to be automatically thrown intoand withdrawn from contactwith the workiatf stated times, as hereinafter described.

The operation is as follows: The work held by the sleeve carried by thespindle Fl is, dur*- ing its rotation, moved longitudinally and'fed tothe cutters by means of` al screwshaft or' any other suitable mechanism.Als the endof the rod or bar of wood emerges from the guide G thebarrel-forming cutter' iis'4 thrown into contact with the work, andAformsthe barrel' of the bobbin, after which itl-is automaticallywithdrawn in the usual manner.v The spiudlel H then advances toward thebobbin, andthe` chuck J engages with the outer endA of said bobbin, and,as said spindleHand; chucLtJ revolve at the same speedi as the spindleF, the revolution continues as before. The gudg# con-forming cutter isnow thrown intoY engagement with the portion of* the work lying;

between the guide G and the rest E, andi the;

V-shaped cutting-edge operates onthe wood so as to form a V-shapedgroove; and the2op eration is continued untill the wood; is entirely cutthrough and the second-ori inner gudgeon of one bobbin and the 'rstv or'outer g'udgeon ot the next bobbin are formed and the n ished bobbinseparated from the remaining portion of the wood. Theygyudgeoni-forming! cutter is then withdrawn andiw-ithh'eld, sofas toallow the work to be fed along, the chuckJl recedes from the finishedbobbin, so as to allow it to drop from the' guide G, and* the formeroperation is repeated Having thus described? my invention, what I claimas new, and desire' tosecur'e by Letters Patent, is-

1. In a machine for making` bobbins,a-sta tionary guide for supportingtheinnerendot 3. In combination with a bobbin-making machine in whichthe barrel is turned, the gudgeous formed, and the bobbin completelyfinished in one and the same machine, a cutter for simultaneouslyforming the second gudgeon of one bobbin and the rst gudgeon of the nextbobbin, substantially as herein described.

WILLIAM R. LAN DFEAR.

Witnesses:

E. B.. BROWN, ADOLPH KOEHLER.

